A pressure filter is a mechanical equipment that uses a special filtering medium to apply pressure to the object, allowing the liquid to percolate out. It is a commonly used solid-liquid separation device. It was first applied in chemical industry production in the early 18th century and is still widely used in industries such as chemicals, metallurgy, dye, food, brewing, ceramics, and environmental protection. The filter plate features stable performance, easy operation, safety, and labor-saving; the metal extrusion cylinder is made from seamless steel pipes and plastic steel filter plates, precision cast, and is resistant to high temperature and pressure, durable.